On 11/17/20 11:19 AM, Sean V Kelley wrote:
If an OS has not been granted AER control via _OSC, then
the OS should not make changes to PCI_ERR_ROOT_COMMAND and
PCI_ERR_ROOT_STATUS related registers. Per section 4.5.1 of
the System Firmware Intermediary (SFI) _OSC and DPC Updates
ECN [1], this bit also covers these aspects of the PCI
Express Advanced Error Reporting. Based on the above and
earlier discussion [2], make the following changes:
Add a check for the native case (i.e., AER control via _OSC)
Note that the current "clear, reset, enable" order suggests that the
reset might cause errors that we should ignore. Lacking historical
context, these will be retained.
[1] System Firmware Intermediary (SFI) _OSC and DPC Updates ECN, Feb 24,
2020, affecting PCI Firmware Specification, Rev. 3.2
https://members.pcisig.com/wg/PCI-SIG/document/14076
[2] https://lore.kernel.org/linux-pci/20201020162820.GA370938@bjorn-Precision-5520/
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
